Projects

Environmental study for campus wide source identification for 260- acre facility requiring evaluation of over 500 noise sources through measurements and modeling; along with community noise measurements, Community noise and mitigation recommendations.

Environmental study and design services for 12,000 ft railway corridor, including modeling, for “absorptive” barrier to reduce noise.

Post-construction community noise study of mitigation alternatives involving comparisons of multiple technologies and approaches for abating as-measured noise levels.

Comprehensive design services including architectural acoustics; mechanical noise control (interior and exterior) and vibration isolation; and structural floor vibration.

Sponsored graduate-thesis work that included measurements of insertion loss for three highway noise-control barriers, all earthen berms, and contributions to the preparation of an organizational design guide.

Environmental Assessment of F-22 supersonic operations over water

Designed and validated tuned mass dampers (TMDs), installed beneath on an exterior cantilevered concourse, which reduced footfall vibration amplitudes by 80%. The facility houses 20,000 people for events including basketball, boxing, ice hockey and concerts

Measurements of noise and analysis of methods to reduce cleanroom noise.

Measurement survey of noise within fabrication areas and associated equipment chases within cleanroom.

Provided measurements and analysis to document the extent to which noise within 4th floor office spaces is compromised by a poorly vibration isolated chiller in a 5th floor mechanical room. Provided recommendations for design improvements.

Measurement survey of vibration within fabrication and sub-fabrication areas within cleanroom

Comprehensive design services including architectural acoustics; mechanical noise control and vibration isolation within fabrication facility’s cleanrooms.

Custom design services of dedicated tool vibration response test facility to document sensitivity of TEL P-12XL probe tester with resulting reductions of facility design costs. Controlled testing of induced vibrations at micron scales.

Design services for new 300 mm wafer fabrication facility

Measurements to characterize existing structural floor mobility within cleanroom and potential for self-induced vibration errors

Comprehensive design services including architectural acoustics; mechanical noise control and vibration isolation; and structural floor vibration.

Comprehensive design services including architectural acoustics; mechanical noise control (interior and exterior) and vibration isolation; and structural floor vibration.

Infrasonic Noise Evaluation

Analysis and reporting of Noise Isolation Class (NIC) of doors and partitions to assess contractual compliance.

Recommendations to Papakura District Council for a program of residential sound insulation at a general aviation airport with historic 1950s vintage “warbird” jet fighters.

Residential Sound Insulation Program. Measured sound transmission of aircraft noise within approximately 160 single family dwellings.

Provided LEED credit design review for acoustics of administration/control/maintenance building.

Provided noise measurements and recommendations to reduce noise levels within a facility control room.

Comprehensive design services including specification of mechanical noise control for two gas turbines; 2000-cooling ton chillers; and operators’ room

Design of medical tower including floor vibration studies for 13th floor of building for a magnetic resonance imaging (MRI) suite.

Atop a mixed-use building, the rooftop cooling systems, connected to a ground-level magnetic resonance imaging (MRI) installation, caused complaints from the residents within a penthouse condominium. Noise and vibration measurements were made to compare levels to the provisions of Local Law 113 Noise Code along with recommendations to mitigate the problematic levels.

Post-installation measurements of mechanical system noise and vibration in order to arrive at an engineered noise-control solution for newly installed air handlers and transformers, along with evaluation of performance of industrial-scale silencers.

Comprehensive design services including architectural acoustics; and mechanical noise control and vibration isolation.

Natural Sciences & Engineering Research Council of Canada, Room Acoustics Study, Professor Murray Hodgson. Measurements of reverberation time and sound propagation in comparison to modeling results for thirteen rooms where speech comprehension and/or music appreciation were of concern, including locations at the University of British Columbia and the Provincial Court of British Columbia.

Supported analysis of excessive footfall vibration on a pedestrian footbridge through a review of vibration measurement data and discussion of design improvements